Public water system · IL0330050
ActiveFlat Rock
At a glance
Flat Rock (PWSID IL0330050) is an active community water system in Crawford County, Illinois. It reports serving 325 people through 168 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
325
Service connections
168
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Flat Rock compare with other water systems in Crawford County?
By EPA's size categories, Flat Rock is a very small system (500 people or fewer). Crawford County has 8 active public water systems. Its population served is well below the county average of 2,595 people per system, and accounts for 1.6% of the 20,758 people reported by systems filed under the county. Across Illinois, the 3,872 active systems average 3,204 people each. Nationally, the average active community water system reports serving 6,703 people, so Flat Rock is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Illinois has 1,773 active community water systems, 46% of the state's 3,872 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 348 Illinois systems (9%) list purchased groundwater as their primary source.
Who owns and regulates Flat Rock?
EPA lists Flat Rock as owned by a local government. The IL state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 6 of the 8 active systems in Crawford County (75%) are also owned by a local government.
Does Flat Rock have drinking water violations?
EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in July 2025. The violations listed here began between June 1977 and July 2025. By type: 3 public notice, recordkeeping or other, 2 contaminant level above the legal limit, 2 monitoring and reporting and 1 reporting. The contaminant or rule involved most often is Consumer Confidence Rule (3 of them). EPA lists 3 as unaddressed, 3 as resolved and 2 as archived. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2025-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2024-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2024-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 1997-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitritecode 1041 | Yes | Resolved |
| 1997-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitritecode 1041 | Yes | Resolved |
| 1995-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1977-06-30 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
All 8 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Flat Rock: frequently asked questions
Who runs Flat Rock?
Flat Rock (PWSID IL0330050) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Flat Rock serve?
Flat Rock reports serving 325 people through 168 service connections in Crawford County, Illinois.
Where does Flat Rock get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Flat Rock have any drinking water violations?
EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in July 2025. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Flat Rock's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.
Where can I find Flat Rock's water quality report?
As a community water system, Flat Rock must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Crawford County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Robinson-Palestine Water Commission | Crawford | 11,331 | Community | Groundwater |
| Hardinville Water Company | Crawford | 3,403 | Community | Groundwater |
| Oblong | Crawford | 2,321 | Community | Purchased groundwater |
| Eaton PWD | Crawford | 1,655 | Community | Purchased groundwater |
| Robinson Correctional Center | Crawford | 1,085 | Community | Purchased groundwater |
| Hutsonville | Crawford | 613 | Community | Purchased groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Flat Rock, PWSID IL0330050, Illinois”, https://aquacensus.com/water-systems/illinois/flat-rock-il0330050 (data as of October 1, 2026).